Revenge's Emily VanCamp Shows Off Her 'Poker Face' at Charity Event

Emily VanCamp and her costar – and off-screen boyfriend – Josh Bowman attended the Mending Kids International Four Kings & An Ace Charity Poker event at West Hollywood hotspot The London on Saturday.

"Emily looked stunning in a nude and black cocktail dress while Josh complimented the outfit with a chic suit and tie," an onlooker at the event, sponsored by El Cartel Tequila, tells PEOPLE. "After laughing over their popcorn, the pair headed to one of the VIP rooms where the celebrity poker tournament was underway."

At the celebrity poker tournament – where player tickets were $10,000 a person! – Robert Downey Jr., Jodie Foster, Sean Penn, Mel Gibson and Gene Simmons played for a good cause.